The TM-209M is a hand Held LED Light Meter with flexible Sensor and clear LCD readout, has range of between 40 and 400,000 Lux and measures whole visible light including RED, AMBER, GREEN, BLUE, PURPLE and WHITE LED,with the ability to hold the maximum and minimum readings and is suitable for use in Factories, Schools, Warehouses, Hospitals, Office Buildings and many other areas with LED Lighting.